High Thermal Stress Turbine Oil Specifications

This technical report outlines the specifications for high thermal stress turbine oils used in modern gas turbines. It discusses the evolution of these specifications in response to the increasing power output and efficiency demands of large gas turbines. The document details the development and significance of specialized oxidation tests, including historical tests and modern methodologies such as the Rotating Pressure Vessel Oxidation Test (RPVOT) and Dry TOST test. These tests are essential for evaluating the performance and long-term stability of lubricating oils under demanding operational conditions. The report also covers the selection criteria for turbine oils and the importance of ensuring their long-term stability. Additionally, it highlights advancements in testing methods that have been introduced to better assess the oxidative stability of turbine oils, reflecting the changing composition and performance requirements of these lubricants. The document serves as a comprehensive resource for understanding the critical aspects of turbine oil specifications and testing.